Alienware X51-R2 Internal Hard disk drive not found
After a year and a half of flawless preformance my Alienware X51-R2 has begun restarting, then showing "Internal hard disk drive not found To resolve this issue, try to reset the drive." After restarting, it seemed as though it was resolved, though now it restarts almost every half-hour with the same error. I have already searched the forums, but no solutions have worked. It is a default Alienware X51-R2 with Windows 8.1 Is there any solution to this error?